Internal defects associated with pruned and nonpruned branch stubs in black walnut / by Alex L. Shigo ... [et al.].

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245 0 0 ‡aInternal defects associated with pruned and nonpruned branch stubs in black walnut / ‡bby Alex L. Shigo ... [et al.].
260 ‡aBroomall, Pa. (370 Reed Road, Broomall, Pa. 19008) : ‡bForest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, ‡c1979.
300 ‡a27 p. : ‡bill. (some col.) ; ‡c26 cm.
490 0 ‡aForest Service research paper NE ; ‡v440
500 ‡a"ODC 245.1 (416.5)"
504 ‡aBibliography: p. 3.
538 ‡aMode of access: Internet.
650 0 ‡aEastern black walnut ‡xPruning.
700 1 ‡aShigo, Alex L., ‡d1930-
710 2 ‡aNortheastern Forest Experiment Station (Radnor, Pa.)
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